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Math Expert V
Joined: 02 Sep 2009
Posts: 65764
Each of the following is the square of an integer EXCEPT  [#permalink]

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Difficulty:   15% (low)

Question Stats: 92% (00:26) correct 8% (00:20) wrong based on 24 sessions

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Each of the following is the square of an integer EXCEPT

(A) 81

(B) 100

(C) 121

(D) 196

(E) 215

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PS Forum Moderator P
Joined: 18 Jan 2020
Posts: 1501
Location: India
GPA: 4
Re: Each of the following is the square of an integer EXCEPT  [#permalink]

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Each of the following is the square of an integer EXCEPT

(A) 81 = √81 = 9 (Integer)

(B) 100 = √100 = 10 (Integer)

(C) 121 = √121 = 12 (Integer)

(D) 196 = √196 = 14 (Integer)

(E) 215 = √215 = 14.66 (Non Integer)

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Manager  S
Joined: 07 Jan 2020
Posts: 162
Location: India
Schools: HEC, EDHEC
GPA: 4
Re: Each of the following is the square of an integer EXCEPT  [#permalink]

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A - 81 = 9^2 Integer
B - 100 = 10^2 Integer
C - 121 = 11^2 Integer
D - 196 = 14^2 Integer
E - 215 = 14.66 Non Integer

GMATWhiz Representative P
Joined: 07 May 2019
Posts: 966
Location: India
Re: Each of the following is the square of an integer EXCEPT  [#permalink]

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Bunuel wrote:
Each of the following is the square of an integer EXCEPT

(A) 81

(B) 100

(C) 121

(D) 196

(E) 215

Solution

• We need to find which among the given answer choices is NOT the square of an integer.
• Let’s look at the answer choices:
o Option A : 81
 $$81 = 9^2$$, square of an integer.
 So, we can eliminate Option A.
o Option B : 100
 $$100 = 10^2$$, square of an integer.
 So, we can eliminate Option B.
o Option C : 121
 $$121 = 11^2$$, square of an integer.
 So, we can eliminate Option C.
o Option D = 196
 $$196 = 14^2$$, square of an integer.
 So, we can eliminate Option D.
• Hence, we are left with Option E only which must be the correct answer.

Thus, the correct answer is Option E.
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# Each of the following is the square of an integer EXCEPT  